Big biceps, small testes?

In the last edition of PNAS, an article discusses the evolutionary tradeoff in a horned beetle between developping weapons vs large testes. If the horns are prevented from developing, the beetle invests more into testes growth. So in this classical sexual competition, you have to choose between outcompeting by force or by sexual prowess. This could mean only one thing Kim Jong Il: sooo small, so small.